1201123101223 has 4 divisors (see below), whose sum is σ = 1220813643928. Its totient is φ = 1181432558520.

The previous prime is 1201123101197. The next prime is 1201123101229. The reversal of 1201123101223 is 3221013211021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201123101223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201123101223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201123101229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9845271261 + ... + 9845271382.

It is an arithmetic number, because the mean of its divisors is an integer number (305203410982).

Almost surely, 2^{1201123101223} is an apocalyptic number.

1201123101223 is a deficient number, since it is larger than the sum of its proper divisors (19690542705).

1201123101223 is an equidigital number, since it uses as much as digits as its factorization.

1201123101223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19690542704.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1201123101223 its reverse (3221013211021), we get a palindrome (4422136312244).

The spelling of 1201123101223 in words is "one trillion, two hundred one billion, one hundred twenty-three million, one hundred one thousand, two hundred twenty-three".